Legal Question in Family Law in Minnesota

No. Until there is a court order to the contrary she has equal access to the home. You must avoid any threatening behavior that could result in a restraining order which may orer you to leave the house. In other words, keep your cool and deescalate any arguments until a divorce is filed and occupancy can be determined by a court.

No, there is no law that states you can prohibit a person from entering her home because she it cheating on her husband.